Authorities are searching for a man who shot an Immigration and Customs Enforcement agent Friday afternoon near Sacramento. The special agent, who was not identified, was shot about 3 p.m. while working with investigators from the Roseville Police Department, according to Immigration and Customs Enforcement. The agent was taken to a hospital and was in stable condition, the agency said. The gunman fled and remained at large Friday afternoon. Roseville is about 18 miles from Sacramento.

Tattoos on the body of the slain Sikh temple gunman and certain biographical details led the FBI to treat the attack at a Milwaukee-area temple as an act of domestic terrorism, officials said Sunday. The shootings in Oak Creek, Wis., left seven dead, including the gunman, and three critically wounded. One of the injured was a police officer who was expected to survive. A federal official who spoke on the condition of anonymity because he was not authorized to speak to the media refused to say whether the gunman was thought to belong to a hate group or some other violent group because the investigation was still unfolding.

SAN DIEGO -- A 19-year-old man suspected of robbing a La Jolla pharmacy at gunpoint was found dead hours later after apparently committing suicide by ingesting the stolen drugs, police said Saturday. The CVS Pharmacy was robbed late Friday morning by a gunman wearing a white mask with a thin mustache, akin to the Guy Fawkes masks worn by protesters in the Occupy movement. Later Friday, the man's family became concerned after not hearing from him. A neighbor found him unconscious and notified police.

A gunman who opened fire on police and was holding two females hostage at an Inglewood home is a 45-year-old with a criminal history, authorities said Wednesday night. The man was holding his girlfriend and her daughter hostage inside the home in the 10700 block of 5th Avenue, said Lt. Dave Dolson of the Los Angeles County Sheriff's Department. He did not provide details on the gunman's criminal history. The tense standoff began about 12:30 p.m. after the gunman tried to drag the daughter, believed to be about 14 years old, by her hair outside the home, according to police.

June 21, 2013 | By David Zucchino, This post has been updated. Please see note below.

DURHAM, N.C. -- A man with a pistol-grip shotgun shot and wounded four people near a law firm and outside a Walmart in Greenville, N.C., late Friday morning, according to Greenville police. The gunman was shot and wounded by police officers at the scene and taken into custody, Greenville Police Chief Hassan Aden said a news conference. The shooter was shot several times, Aden said, and carried "a significant amount of ammunition -- enough to really do some significant damage.

January 5, 2013 | By Andrew Khouri, This post has been updated. See note below for details.

Four people died at an Aurora, Colo., townhome early Saturday morning, including a gunman who barricaded himself inside for hours, police said. Around 9 a.m., police said the suspect shot at officers from a second-story window. They returned fire, hitting the man. The suspect was pronounced dead in an upstairs bedroom. Inside the home, police discovered two other men and one woman dead. Another woman was able to escape early Saturday morning when she jumped from an upstairs window, and called police around 3 a.m., Aurora Police Sgt. Cassidee Carlson told the Denver Post.

Four people were shot -- three fatally -- at a central Florida salon Thursday morning before the shooter turned the gun on himself, local Florida media reported. A gunman walked into the Las Dominicanas M & M Salon in Casselberry about 11 a.m. and shot four women before walking away from the scene and going to a residence some miles away, where he shot himself, the Orlando Sentinel reported. Police have not identified the shooter or his victims. Family members of the victims and shooter were at the scene Thursday morning.

A lockdown of the Kingston campus of the University of Rhode Island ended on Thursday with no indication that there was ever a gunman at the school, officials said. Hours after the school sent out an alert warning students and educators to stay indoors, the emergency shutdown was lifted, the school said on its website. “The Kingston campus lock-down has ended. State police have cleared Chafee Hall. The investigation has revealed that at no time was there a gun or an active shooter on the campus,” the school said.

A gunman who allegedly opened fire on LAPD officers Saturday morning was taken into custody after barricading himself inside a house in South L.A., police reported. Teams from the Los Angeles Police Department's SWAT unit and bomb squad were summoned to the home in the 100 block of West 57th Street in the South Park neighborhood, where the man had retreated after trading gunfire with an officer, said Officer Norma Eisenman. Officers had responded to an initial call of a man with a gun near 57th and Main streets about 10:30 a.m., Eisenman said.

A lockdown was lifted at Canoga Park High School on Thursday as police continued to search for a man with a gun seen on campus. The school was placed on lockdown at about 9:25 a.m. as officers from the LAPD and Los Angeles Unified School District police searched in and around the campus for the gunman, said LAPD Officer Christopher No. According to reports from the scene, No said, a young man or juvenile was walking down the street with...